Quadrupole Coupling Parameters of Olefinic Deuterons: 2H MAS NMR Spectroscopy of Photochromic Spiropyran and Merocyanines

2002 ◽  
Vol 106 (16) ◽  
pp. 4028-4031 ◽  
Author(s):  
Wallace O'Neil Parker, ◽  
Jonathan Hobley ◽  
Vincenzo Malatesta
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Quadrupole Coupling ◽  
Coupling Parameters

scholarly journals On the preparation and NMR spectroscopic characterization of potassium aluminium tetrahydride KAlH4

2019 ◽  
Vol 21 (23) ◽  
pp. 12576-12584 ◽  
Author(s):  
Bodo Zibrowius ◽  
Michael Felderhoff
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Shift ◽  
Spectroscopic Characterization ◽  
Mas Nmr ◽  
Isotropic Chemical Shift ◽  
Quadrupole Coupling ◽  
Coupling Parameters

Conventional 1D 27Al MAS NMR spectroscopy allows the isotropic chemical shift and the quadrupole coupling parameters of Pnma KAlH4 to be determined precisely.

14N MAS NMR Spectroscopy and Quadrupole Coupling Data in Characterization of the IV ↔ III Phase Transition in Ammonium Nitrate

2002 ◽  
Vol 106 (11) ◽  
pp. 3026-3032 ◽  
Author(s):  
Tania Giavani ◽  
Henrik Bildsøe ◽  
Jørgen Skibsted ◽  
Hans J. Jakobsen
Keyword(s):  
Phase Transition ◽  
Nmr Spectroscopy ◽  
Ammonium Nitrate ◽  
Mas Nmr ◽  
Quadrupole Coupling

51V Chemical Shielding and Quadrupole Coupling in Ortho- and Metavanadates from51V MAS NMR Spectroscopy

1998 ◽  
Vol 37 (12) ◽  
pp. 3083-3092 ◽  
Author(s):  
Jørgen Skibsted ◽  
Claus J. H. Jacobsen ◽  
Hans J. Jakobsen
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Chemical Shielding ◽  
Quadrupole Coupling

scholarly journals Sampling Method Affects HR-MAS NMR Spectra of Healthy Caprine Brain Biopsies

Metabolites ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 38
Author(s):  
Annakatrin Häni ◽  
Gaëlle Diserens ◽  
Anna Oevermann ◽  
Peter Vermathen ◽  
Christina Precht
Keyword(s):  
Nmr Spectroscopy ◽  
Sampling Method ◽  
Magic Angle Spinning ◽  
Mas Nmr ◽  
Magic Angle ◽  
1H Nuclear Magnetic Resonance ◽  
Rapid Changes ◽  
Tissue Degradation ◽  
Angle Spinning

The metabolic profiling of tissue biopsies using high-resolution–magic angle spinning (HR-MAS) 1H nuclear magnetic resonance (NMR) spectroscopy may be influenced by experimental factors such as the sampling method. Therefore, we compared the effects of two different sampling methods on the metabolome of brain tissue obtained from the brainstem and thalamus of healthy goats by 1H HR-MAS NMR spectroscopy—in vivo-harvested biopsy by a minimally invasive stereotactic approach compared with postmortem-harvested sample by dissection with a scalpel. Lactate and creatine were elevated, and choline-containing compounds were altered in the postmortem compared to the in vivo-harvested samples, demonstrating rapid changes most likely due to sample ischemia. In addition, in the brainstem samples acetate and inositols, and in the thalamus samples ƴ-aminobutyric acid, were relatively increased postmortem, demonstrating regional differences in tissue degradation. In conclusion, in vivo-harvested brain biopsies show different metabolic alterations compared to postmortem-harvested samples, reflecting less tissue degradation. Sampling method and brain region should be taken into account in the analysis of metabolic profiles. To be as close as possible to the actual situation in the living individual, it is desirable to use brain samples obtained by stereotactic biopsy whenever possible.

Surface Species Formed during Aniline Methylation on Zeolite H–Y Investigated by in Situ MAS NMR Spectroscopy

2001 ◽  
Vol 203 (2) ◽  
pp. 375-381 ◽  
Author(s):  
Irina I Ivanova ◽  
Elena B Pomakhina ◽  
Alexander I Rebrov ◽  
Michael Hunger ◽  
Yuryi G Kolyagin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Mas Nmr ◽  
Surface Species

Investigating Sorption on Iron−Oxyhydroxide Soil Minerals by Solid-State NMR Spectroscopy:  A6Li MAS NMR Study of Adsorption and Absorption on Goethite

2005 ◽  
Vol 109 (39) ◽  
pp. 18310-18315 ◽  
Author(s):  
Ulla Gro Nielsen ◽  
Younkee Paik ◽  
Keinia Julmis ◽  
Martin A. A. Schoonen ◽  
Richard J. Reeder ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Mas Nmr ◽  
Iron Oxyhydroxide ◽  
Soil Minerals ◽  
Solid State Nmr Spectroscopy ◽  
Nmr Study
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